<?php
/*
 * YCKIT SMTP类
 * ============================================================================
 * 版权所有 2012 YCKIT.COM 并保留所有权利。
 * 这不是一个自由软件！您只能在不用于商业目的的前提下对程序代码进行修改和使用；
 * 不允许对程序代码以任何形式任何目的的再发布。
 * ============================================================================
 * 作者：野草
 * 更新：2012年02月06日
 */
class smtp{
	var $smtp_port;
	var $time_out;
	var $host_name;
	var $log_file;
	var $relay_host;
	var $debug;
	var $auth;
	var $user;
	var $pass;
	var $sock;
	function __construct($relay_host="", $smtp_port=25,$auth=false,$user,$pass){
		$this->debug=false;
		$this->smtp_port=$smtp_port;
		$this->relay_host=$relay_host;
		$this->time_out=30; //is used in fsockopen()
		$this->auth=$auth;//auth
		$this->user=$user;
		$this->pass=$pass;
		$this->host_name="localhost"; //is used in HELO command
		$this->log_file="";
		$this->sock=false;
	}
	function send($to,$from,$subject="",$body="",$mailtype, $cc="",$bcc="",$additional_headers="") {
			$mail_from=$this->get_address($this->strip_comment($from));
			$body=ereg_replace("(^|(\r\n))(\.)", "\1.\3", $body);
			$header="";
			$header .= "MIME-Version:1.0\r\n";
			if($mailtype=="HTML"){
				$header .= "Content-Type:text/html\r\n";
			}
			$header .= "To: ".$to."\r\n";
			if ($cc != "") {
				$header .= "Cc: ".$cc."\r\n";
			}
			$header .= "From: $from<".$from.">\r\n";
			$header .= "Subject: ".$subject."\r\n";
			$header .= $additional_headers;
			$header .= "Date: ".date("r")."\r\n";
			$header .= "X-Mailer:By Redhat (PHP/".phpversion().")\r\n";
			list($msec, $sec)=explode(" ", microtime());
			$header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">\r\n";
			$TO=explode(",", $this->strip_comment($to));
			if ($cc!=""){
				$TO=array_merge($TO, explode(",", $this->strip_comment($cc)));
			}
			if ($bcc != ""){
				$TO=array_merge($TO, explode(",", $this->strip_comment($bcc)));
			}
			$sent=TRUE;
			foreach ($TO as $rcpt_to) {
				$rcpt_to=$this->get_address($rcpt_to);
				if (!$this->smtp_sockopen($rcpt_to)) {
				$this->log_write("Error: Cannot send email to ".$rcpt_to."\n");
				$sent=FALSE;
				continue;
			}
			if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {
				$this->log_write("E-mail has been sent to <".$rcpt_to.">\n");
			} else {
				$this->log_write("Error: Cannot send email to <".$rcpt_to.">\n");
				$sent=FALSE;
			}
			fclose($this->sock);
			$this->log_write("Disconnected from remote host\n");
		}
		return $sent;
	}
	function smtp_send($helo, $from, $to, $header, $body="") {
		if (!$this->smtp_putcmd("HELO", $helo)) {
		return $this->smtp_error("sending HELO command");
		}
		if($this->auth){
			if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {
				return $this->smtp_error("sending HELO command");
			}

			if (!$this->smtp_putcmd("", base64_encode($this->pass))) {
				return $this->smtp_error("sending HELO command");
			}

		}
		if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">")){
			return $this->smtp_error("sending MAIL FROM command");
		}
		if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">")) {
			return $this->smtp_error("sending RCPT TO command");
		}
		if (!$this->smtp_putcmd("DATA")) {
			return $this->smtp_error("sending DATA command");
		}
		if (!$this->smtp_message($header, $body)) {
			return $this->smtp_error("sending message");
		}
		if (!$this->smtp_eom()) {
			return $this->smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
		}
		if (!$this->smtp_putcmd("QUIT")) {
			return $this->smtp_error("sending QUIT command");
		}
		return true;
	}
	function smtp_sockopen($address){
		if ($this->relay_host == "") {
			return $this->smtp_sockopen_mx($address);
		}else{
			return $this->smtp_sockopen_relay();
		}
	}
	function smtp_sockopen_relay(){
		$this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\n");
		$this->sock=@fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);
		if (!($this->sock && $this->smtp_ok())) {
			$this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\n");
			$this->log_write("Error: ".$errstr." (".$errno.")\n");
			return false;

		}
		$this->log_write("Connected to relay host ".$this->relay_host."\n");
		return true;
	}
	function smtp_sockopen_mx($address){
		$domain=ereg_replace("^.+@([^@]+)$", "\1", $address);
		if (!@getmxrr($domain, $MXHOSTS)) {
			$this->log_write("Error: Cannot resolve MX \"".$domain."\"\n");
			return false;
		}
		foreach ($MXHOSTS as $host) {
			$this->log_write("Trying to ".$host.":".$this->smtp_port."\n");
			$this->sock=@fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);
			if (!($this->sock && $this->smtp_ok())) {
			$this->log_write("Warning: Cannot connect to mx host ".$host."\n");
			$this->log_write("Error: ".$errstr." (".$errno.")\n");
			continue;
			}
		$this->log_write("Connected to mx host ".$host."\n");
		return true;
		}
		$this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\n");
		return false;
	}
	function smtp_message($header, $body){
		fputs($this->sock, $header."\r\n".$body);
		$this->smtp_debug("> ".str_replace("\r\n", "\n"."> ", $header."\n> ".$body."\n> "));
		return true;
	}
	function smtp_eom()   {
		fputs($this->sock, "\r\n.\r\n");
		$this->smtp_debug(". [EOM]\n");
		return $this->smtp_ok();
	}
	function smtp_ok()    {
		$response=str_replace("\r\n", "", fgets($this->sock, 512));
		$this->smtp_debug($response."\n");
		if (!ereg("^[23]", $response)) {
			fputs($this->sock, "QUIT\r\n");
			fgets($this->sock, 512);
			$this->log_write("Error: Remote host returned \"".$response."\"\n");
			return false;
		}
	return true;
	}
	function smtp_putcmd($cmd, $arg=""){
	if ($arg != "") {
		if($cmd=="") $cmd=$arg;
		else $cmd=$cmd." ".$arg;
	}
		fputs($this->sock, $cmd."\r\n");
		$this->smtp_debug("> ".$cmd."\n");
		return $this->smtp_ok();
	}
	function smtp_error($string){
		$this->log_write("Error: Error occurred while ".$string.".\n");
		return false;
	}
	function log_write($message){
		$this->smtp_debug($message);
		if ($this->log_file == "") {
			return true;
		}
		$message=date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;
		if (!@file_exists($this->log_file) || !($fp=@fopen($this->log_file, "a"))) {
			$this->smtp_debug("Warning: Cannot open log file \"".$this->log_file."\"\n");
			return false;
		}
		flock($fp, LOCK_EX);
		fputs($fp, $message);
		fclose($fp);
		return true;
	}
	function strip_comment($address)   {
		$comment="\([^()]*\)";
		while (ereg($comment, $address)){
			$address=ereg_replace($comment, "", $address);
		}
		return $address;
	}
	function get_address($address)   {
		$address=ereg_replace("([ \t\r\n])+", "", $address);
		$address=ereg_replace("^.*<(.+)>.*$", "\1", $address);
		return $address;
	}
	function smtp_debug($message){
		if ($this->debug){
			echo $message;
		}
	}
}